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418 C h a p t e r 1 0 C o r r o s i o n i n S o i l s a n d M i c r o b i o l o g i c a l l y I n f l u e n c e d C o r r o s i o n 419

organisms present in field sample. Concentration of cell constituents correlates to level of ATP level correlates well with microbial metabolism level. Its concentration reflects the level of activity in A specialized lab technique useful in discovering nutrient sources for MIC and in quickly

Comments a sample. system.

Protein, lipopolysaccharide, nucleic acid analysis: Established methods, widely available. Adenosine triphosphate (ATP): Fluorometer and supplies commercially available for field use. 35 S-sulfate reduction: Radioactively labeled sulfate is incubated in field sample. H 2 S formed is liberated b

Method scintillation counter. a rate of reaction.

Assay Biomass Metabolic activity Sulfate reduction Enzyme activity (continued) TABLE 10.9